Fredric c



(No Model.)

F. '0. WEIR xv B.v PURNBSS. FILTER.

No. 471,496. Patented Mar. 22, 1892.y

STATES ATENT FFICE.

FREDRIO O. IVEIR AND HENRY B. FURNESS, OF CINCINNATI, OHIO; SAID FURNESS ASSIGNOR TO SAID VVEIR.

FILTER.

SPECIFICATION forming part of Letters Patent No. 471,496, dated March 22, 1892. Application tiled September 14, 1891. Serial No. 405,677. (No model.)

To all whom t may concern:

Be it known that we, FREDRIC C. WEIR and HENRY B. FURNEss, citizens of the United States, and residents of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Filters, of which the'following is a speciiication.

This invention relates to filters, and has for its object to provide novel means for cleaning a filtering-cylinder.

To accomplish this'object our invention involves the features of construction and the combination or arrangement of devices hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure 1 is a longitudinal central vertical section of our improvement. Fig. 2 is an end View thereof. Fig. 3 is a modification of Fig. 2. Fig. 4 is another modification.

1 represents the ltercase, 2 a filteringcylinder, and 3 a shaft on which the same is mounted, which is journaled in the stuffingboxes 4.

5 represents a cap forming a chamber to .receive the filtered Water.

6 represents a hollow in the shaft 3 for conveying water from the cylinder to the filtering-chamber 5.

7 represents a solid bar or body of abrasive material, Which may be formed of burnt clay, emery, or other similar material; or sand-paper may be used for this purpose. It is shown supported by guide-lugs 8 on the filter-case.

9 represents elastic rings engaging round the abrasive piece and the shaft 3, so as to hold the same in contact With the cylinder,

tion of spring which may be substituted iu lieu of Weight 12. 13 represents said spring, which is of elliptic form and which is secured to the abrasive bar by screw 14. 15 represents the inlet-pipe, and 16 the discharge-pipe for washing out the dirty Water. 17 represents the discharge-pipe for discharging filtered Water, the desideratum being to obtain a yielding engagement ofthe abrading-bar applied to the outer periphery of the cylinder. This yielding engagement may be either by Weight or spring.

We have shown as the preferred form of construction the cylinder revolving against the abrasive bar, which is held stationary by the outer casing. Itis obvious that the rotary motion might be applied to the outer cylinder and the Vinner one held stationary, or other similar modifications made Without departing from the principal feature of our invention.

It will be observed that the abrasive body projects outside of the cylinder in Fig. 3 and works in the guides and that suitable means are provided to force the abrasive body against the periphery of the cylinder so as to clean off the deposit thereon. By making the guides outside of the cylinder aconsiderable saving of weight is edected and the abrasive body is better held in place and more easily forced against the filter-cylinder than if the cylinder is made large* enough to have the guides inside. We do not limit ourselves to -the use of a solid bar of abrasive material.

Of course it is not absolutely essential that the abrasive or scraping material should be in exactly radial planes, but it should be, substantially, so that it can act as a scraper, and either weights or springs may be employed to force the abrasive body against the pee riphery of the cylinder, friction can be obtained.

Having described our invention, what We claim is 1. The combination, with a filter-case and a filtering-cylinder arranged therein, of a solid bar of abrasive material extending substantially -the full length of the lteringcylinder and yieldingly held in contact with the external surface'thereof, substantially as and for the purposes described.

so' that the proper IOO 2. The combinatiomwith a Iilter-case, a r0- tary filtering-cylinder arranged therein, and means for turning the cylinder, of a solid body of abrasive material extending substantially the full length of the cylinder and yieldingly held in contact with the external snrface thereof, substantially as described.

3. The combination, With a filter-oase, a filtering-cylinder arranged therein, and radial guides, of an integral abrasive body extending radially out from the cylinder the full length thereof, supported by and movable in the guides and yieldingly heldin con tact with the external surface of the cylinder, substantially as described.

4. The combination of a filter-case provided with radial guides, a filtering-cylinder arranged in the filter-oase, means for turning the cylinder, an integral abrasive body eX- tending substantially the fnll length of the cylinder, supported by and movable in the guides and projecting radially therefrom, and means for holding the abrasive body yieldingly in contact with the external surface of the cylinder, substantially as described.

5. The combination, With the outer filteroase, the filtering-cylinder, and the radial abrasive material, of the housing or cap 1l, se-

`curedto the outer case and servingas aguide to hold and direct the radial abrasive mate- -rial in contact With the outer periphery of the FREDRIO o. WEIR.

HENRY B. FURNESSL Witnesses:

T. SIMMONS, G. W. MILES. 

